described at URL: https://www.flickr.com/photos/frozentundra/5445227283/ operator: Flickr URL: https://live.staticflickr.com/4075/5445227283_00bc639389_o.jpg
DescriptionFire sprinkler victaulic couplings.jpg English: Victaulic couplings used for sprinkler piping. Date 15 January 2010 Source Own work Author Achim
DescriptionWWII-Field Installation With Victaulic Couplings.jpg English: WWII-Field Installation With Victaulic Couplings Date 3 July 2013, 11:29:26 Source